以下是我用Swing 组件编写的记事本,功能是模仿微软的,使用了观感,自我觉得界面比Win的记事本更为好看(臭屁一下吧)。除了没有做字体选择之外,其他功能基本都有了吧。
/** **/
/**
*Author:
Zhang Zhijian
*Mail: qnjian@163.com
*Created on 2005-5-22
* 声明:本程序版权归作者所有,允许以学习目的的传播,
* 但必须保留本作者署名及源程序的完整!
*/
package
com.qnjian.notpad;
![](/Images/OutliningIndicators/None.gif)
import
javax.swing.
*
;
import
java.io.
*
;
import
java.awt.
*
;
import
java.awt.event.
*
;
![](/Images/OutliningIndicators/None.gif)
public
class
NotePad
extends
JFrame
implements
ActionListener,ItemListener
![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
boolean
haveCreated
=
false
;
File file
=
null
;
String strtext
=
""
;
int
findIndex
=
0
;
String findStr;
JMenuBar menubar
=
new
JMenuBar();
JMenu meFile
=
new
JMenu(
"
文件
"
);
JMenu meEdit
=
new
JMenu(
"
编辑
"
);
JMenu meStyle
=
new
JMenu(
"
风格
"
);
JMenu meHelp
=
new
JMenu(
"
帮助
"
);
JMenuItem miCreate
=
new
JMenuItem(
"
新建
"
);
JMenuItem miOpen
=
new
JMenuItem(
"
打开
"
);
JMenuItem miSave
=
new
JMenuItem(
"
保存
"
);
JMenuItem miSaveAs
=
new
JMenuItem(
"
另存为
"
);
JMenuItem miExit
=
new
JMenuItem(
"
退出
"
);
JMenuItem miUndo
=
new
JMenuItem(
"
撤消
"
);
JMenuItem miCut
=
new
JMenuItem(
"
剪切
"
);
JMenuItem miCopy
=
new
JMenuItem(
"
复制
"
);
JMenuItem miPaste
=
new
JMenuItem(
"
粘贴
"
);
JMenuItem miDelete
=
new
JMenuItem(
"
删除
"
);
JMenuItem miFind
=
new
JMenuItem(
"
查找
"
);
JMenuItem miNext
=
new
JMenuItem(
"
查找下一个
"
);
JMenuItem miReplace
=
new
JMenuItem(
"
替换
"
);
//
右键弹出菜单项
JMenuItem pmUndo
=
new
JMenuItem(
"
撤消
"
);
JMenuItem pmCut
=
new
JMenuItem(
"
剪切
"
);
JMenuItem pmCopy
=
new
JMenuItem(
"
复制
"
);
JMenuItem pmPaste
=
new
JMenuItem(
"
粘贴
"
);
JMenuItem pmDelete
=
new
JMenuItem(
"
删除
"
);
JCheckBoxMenuItem miNewLine
=
new
JCheckBoxMenuItem(
"
自动换行
"
);
JMenu smLookFeel
=
new
JMenu(
"
观感
"
);
JMenuItem metal
=
new
JMenuItem(
"
Metal
"
);
JMenuItem motif
=
new
JMenuItem(
"
Motif
"
);
JMenuItem windows
=
new
JMenuItem(
"
Windows
"
);
JMenuItem miAbout
=
new
JMenuItem(
"
关于
"
);
JPopupMenu popupMenu;
JTextArea text
=
new
JTextArea();
![](/Images/OutliningIndicators/InBlock.gif)
public
NotePad()
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
super
(
"
我的记事本
"
);
//
为便于区分事件源,设定名字
miCreate.setActionCommand(
"
create
"
);
miOpen.setActionCommand(
"
open
"
);
miSave.setActionCommand(
"
save
"
);
miSaveAs.setActionCommand(
"
saveAs
"
);
miExit.setActionCommand(
"
exit
"
);
miUndo.setActionCommand(
"
undo
"
);
miCut.setActionCommand(
"
cut
"
);
miCopy.setActionCommand(
"
copy
"
);
miPaste.setActionCommand(
"
paste
"
);
miDelete.setActionCommand(
"
delete
"
);
miFind.setActionCommand(
"
find
"
);
miNext.setActionCommand(
"
next
"
);
miReplace.setActionCommand(
"
replace
"
);
miNewLine.setActionCommand(
"
newLine
"
);
miAbout.setActionCommand(
"
about
"
);
pmUndo.setActionCommand(
"
undo
"
);
pmCut.setActionCommand(
"
cut
"
);
pmCopy.setActionCommand(
"
copy
"
);
pmPaste.setActionCommand(
"
paste
"
);
pmDelete.setActionCommand(
"
delete
"
);
this
.setSize(
500
,
500
);
this
.setLocation(
300
,
150
);
this
.setJMenuBar(menubar);
meFile.setFont(
new
Font(
"
宋体
"
,Font.BOLD,
15
));
meEdit.setFont(
new
Font(
"
宋体
"
,Font.BOLD,
15
));
meStyle.setFont(
new
Font(
"
宋体
"
,Font.BOLD,
15
));
meHelp.setFont(
new
Font(
"
宋体
"
,Font.BOLD,
15
));
menubar.add(meFile);
menubar.add(meEdit);
menubar.add(meStyle);
menubar.add(meHelp);
meFile.add(miCreate);
meFile.add(miOpen);
meFile.add(miSave);
meFile.add(miSaveAs);
meFile.addSeparator();
meFile.add(miExit);
meEdit.add(miUndo);
meEdit.addSeparator();
meEdit.add(miCut);
meEdit.add(miCopy);
meEdit.add(miPaste);
meEdit.add(miDelete);
meEdit.addSeparator();
meEdit.add(miFind);
meEdit.add(miNext);
meEdit.addSeparator();
meEdit.add(miReplace);
meStyle.add(miNewLine);
meStyle.add(smLookFeel);
smLookFeel.add(metal);
smLookFeel.add(motif);
smLookFeel.add(windows);
meHelp.add(miAbout);
//
添加到右键弹出菜单
popupMenu
=
new
JPopupMenu();
popupMenu.add(pmUndo);
popupMenu.addSeparator();
popupMenu.add(pmCut);
popupMenu.add(pmCopy);
popupMenu.add(pmPaste);
popupMenu.add(pmDelete);
//
添加按钮事件监听
meHelp.addActionListener(
this
);
miCreate.addActionListener(
this
);
miOpen.addActionListener(
this
);
miSave.addActionListener(
this
);
miSaveAs.addActionListener(
this
);
miExit.addActionListener(
this
);
miUndo.addActionListener(
this
);
miCut.addActionListener(
this
);
miCopy.addActionListener(
this
);
miPaste.addActionListener(
this
);
miDelete.addActionListener(
this
);
miFind.addActionListener(
this
);
miNext.addActionListener(
this
);
miReplace.addActionListener(
this
);
miNewLine.addItemListener(
this
);
miAbout.addActionListener(
this
);
metal.addActionListener(
this
);
motif.addActionListener(
this
);
windows.addActionListener(
this
);
//
添加右键按钮事件监听器
pmUndo.addActionListener(
this
);
pmCut.addActionListener(
this
);
pmCopy.addActionListener(
this
);
pmPaste.addActionListener(
this
);
pmDelete.addActionListener(
this
);
//
文本区内容没有选中时某些按钮不可用
miCut.setEnabled(
false
);
miCopy.setEnabled(
false
);
miDelete.setEnabled(
false
);
pmCut.setEnabled(
false
);
pmCopy.setEnabled(
false
);
pmDelete.setEnabled(
false
);
JScrollPane scrollPane
=
new
JScrollPane(text);
getContentPane().add(scrollPane,
"
Center
"
);
text.setFont(
new
Font(
"
Fixedsys
"
,Font.TRUETYPE_FONT,
15
));
setVisible(
true
);
//
添加键盘输入监听器
text.addFocusListener(
new
MyFocusAdapter());
//
添加鼠标监听器,用于激活右键弹出菜单
text.addMouseListener(
new
MouseAdapter()
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
public
void
mouseReleased(MouseEvent e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
if
(e.isPopupTrigger())
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
popupMenu.show(e.getComponent(),e.getX(),e.getY());
}
}
}
);
//
添加窗口关闭监听器
addWindowListener(
new
WindowAdapter()
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
public
void
windowClosing(WindowEvent e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
//
询问是否保存时选择撤消
int
i;
if
( (i
=
askForSave())
==
3
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
return
;
}
System.exit(
0
);
}
}
);
}
//////////////////////////
Methods
////////////////////////////////////
/
//
打开
public
void
open()
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
JFileChooser jc
=
new
JFileChooser();
jc.showOpenDialog(
this
);
File f
=
jc.getSelectedFile();
if
(f
==
null
)
//
没有选择文件则退出
{
return
;
}
file
=
f;
//
file 是File类的对象,为本类属性,在保存当前内容时用
this
.setTitle(f.getName()
+
"
--记事本
"
);
FileReader fr
=
null
;
int
len
=
(
int
)f.length();
char
[] ch
=
new
char
[len];
int
num
=
0
;
try
{
fr
=
new
FileReader(f);
while
(fr.ready())
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
num
+=
fr.read(ch,num,len
-
num);
}
//
保存在属性strtext中,为了便于撤消恢复及监视内容是否改变
strtext
=
new
String(ch,
0
,num);
haveCreated
=
false
;
text.setText(strtext);
}
catch
(Exception e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
JOptionPane.showMessageDialog(
this
,
"
出错:
"
+
e.getMessage());
}
finally
{
try
{
fr.close();
}
catch
(IOException e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
JOptionPane.showMessageDialog(
this
,
"
出错:
"
+
e.getMessage());
}
}
}
//
保存
public
void
save(File f)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
String saveStr
=
text.getText();
FileWriter fw
=
null
;
try
{
fw
=
new
FileWriter(f);
fw.write(saveStr);
fw.flush();
}
catch
(Exception e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
JOptionPane.showMessageDialog(
this
,
"
出错:
"
+
e.getMessage());
}
finally
{
try
{
fw.close();
}
catch
(IOException e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
JOptionPane.showMessageDialog(
this
,
"
出错:
"
+
e.getMessage());
}
}
haveCreated
=
false
;
JOptionPane.showMessageDialog(
this
,
"
文件保存成功!
"
);
}
//
另存为
public
void
saveAs()
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
JFileChooser fs
=
new
JFileChooser();
fs.showSaveDialog(
this
);
File f
=
fs.getSelectedFile();
if
(f
!=
null
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
save(f);
this
.setTitle(f.getName()
+
"
--记事本
"
);
file
=
f;
}
}
/** */
/**
如果显示的文件内容与原来有改变,询问是否保存
*
@return
int 0: no operation 1:yes 2:no 3:cancel -1:error return
*/
public
int
askForSave()
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
if
(haveCreated
&&
text.getText()
==
""
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
return
0
;
}
if
(text.getText().equals(strtext)
==
false
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
String fn;
if
(file
!=
null
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
fn
=
""
+
file.getName();
}
else
{
fn
=
"
未命名
"
;
}
int
i
=
JOptionPane.showConfirmDialog(
this
,
"
文件
"
+
fn
+
"
的文字已经改变。
"
+
"
\n要保存文件吗?
"
,
"
记事本
"
,JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE);
if
(i
==
JOptionPane.YES_OPTION)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
if
(file
==
null
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
saveAs();
}
else
{
save(file);
}
return
1
;
}
if
(i
==
JOptionPane.NO_OPTION)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
return
2
;
}
if
(i
==
JOptionPane.CANCEL_OPTION)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
return
3
;
}
}
return
-
1
;
}
//
查找
public
void
find(String str,
int
cur)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
int
i
=
text.getText().indexOf(str,cur);
if
(i
>=
0
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
this
.text.setSelectionStart(i);
//
使找到的字符串反白选中
this
.text.setSelectionEnd(i
+
str.length());
findIndex
=++
i;
//
用于查找下一个
}
else
{
JOptionPane.showMessageDialog(
this
,
"
查找完毕!
"
,
"
记事本
"
,
JOptionPane.OK_OPTION
+
JOptionPane.INFORMATION_MESSAGE);
}
}
//
替换全部
public
void
replaceAll(String fromStr,String toStr,
int
cur,
int
end)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
if
(cur
>
end)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
return
;
}
else
{
int
i
=
text.getText().indexOf(fromStr,cur);
if
(i
>=
0
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
text.setSelectionStart(i);
//
使找到的字符串反白选中
text.setSelectionEnd(i
+
fromStr.length());
text.replaceSelection(toStr);
//
替换
cur
=++
i;
}
else
{
JOptionPane.showMessageDialog(
this
,
"
替换完毕!
"
,
"
记事本
"
,
JOptionPane.OK_OPTION
+
JOptionPane.INFORMATION_MESSAGE);
return
;
}
replaceAll(fromStr,toStr,cur,end);
//
递归查找与替换
}
}
//
切换观感
public
void
changeLookFeel(Component c, String plafName)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
try
{
UIManager.setLookAndFeel(plafName);
SwingUtilities.updateComponentTreeUI(c);
}
catch
(Exception e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
JOptionPane.showMessageDialog(
this
,
"
观感加载失败!
"
,
"
记事本
"
,
JOptionPane.YES_OPTION
+
JOptionPane.INFORMATION_MESSAGE);
}
}
////////////////////////
实现监听类的方法(本类实现了相应接口)
//////////////////////////////////
/
public
void
itemStateChanged(ItemEvent e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
if
(e.getStateChange()
==
e.SELECTED)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
text.setLineWrap(
true
);
}
else
{
text.setLineWrap(
false
);
}
}
public
void
actionPerformed(ActionEvent e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
String com
=
e.getActionCommand();
if
(com.equals(
"
create
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
//
当前显示的文件内容如有改变,询问是否保存
//
返回:询问是否保存时选择否
//
返回3:询问是否保存时选择撤消
int
i;
if
((i
=
askForSave())
==
3
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
return
;
}
text.setText(
""
);
file
=
null
;
this
.setTitle(
"
未命名--记事本
"
);
strtext
=
""
;
haveCreated
=
true
;
}
if
(com.equals(
"
open
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
//
询问是否保存时选择撤消
int
i;
if
((i
=
askForSave())
==
3
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
return
;
}
open();
strtext
=
text.getText();
}
if
(com.equals(
"
saveAs
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
saveAs();
strtext
=
text.getText();
}
if
(com.equals(
"
save
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
if
(haveCreated
||
file
==
null
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
saveAs();
}
else
{
save(file);
}
strtext
=
text.getText();
}
if
(com.equals(
"
undo
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
text.setText(strtext);
}
if
(com.equals(
"
cut
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
//
先保存文本区内容,供撤消后恢复使用
strtext
=
text.getText();
text.cut();
}
if
(com.equals(
"
copy
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
text.copy();
}
if
(com.equals(
"
paste
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
strtext
=
text.getText();
text.paste();
}
if
(com.equals(
"
delete
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
strtext
=
text.getText();
text.replaceSelection(
""
);
}
if
(com.equals(
"
find
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
findIndex
=
0
;
FindDialog fd
=
new
FindDialog(
this
);
}
if
(com.equals(
"
next
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
//
没有选中内容则从头开始查找
String str
=
text.getSelectedText();
if
(str
==
""
||
str
==
null
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
findIndex
=
0
;
}
if
(str
==
null
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
FindDialog fd
=
new
FindDialog(
this
);
}
else
{
find(str,text.getSelectionStart()
+
1
);
}
}
if
(com.equals(
"
replace
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
ReplaceDialog rd
=
new
ReplaceDialog(
this
);
}
if
(com.equals(
"
about
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
JOptionPane.showMessageDialog(
this
,
"
我的记事本 V1.0\n作者:ZhiJian Zhang \n2005/5/25 Copyright
"
,
"
关于我的记事本
"
,JOptionPane.OK_OPTION
+
JOptionPane.INFORMATION_MESSAGE);
}
//
观感选择
if
(e.getActionCommand().equals(
"
Metal
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
String metal_str
=
"
javax.swing.plaf.metal.MetalLookAndFeel
"
;
changeLookFeel(
this
,metal_str);
}
if
(e.getActionCommand().equals(
"
Motif
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
String motif_str
=
"
com.sun.java.swing.plaf.motif.MotifLookAndFeel
"
;
changeLookFeel(
this
,motif_str);
}
if
(e.getActionCommand().equals(
"
Windows
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
//
String windows_str="com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel"
String windows_str
=
"
com.sun.java.swing.plaf.windows.WindowsLookAndFeel
"
;
changeLookFeel(
this
,windows_str);
}
if
(e.getActionCommand().equals(
"
exit
"
))
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
int
i;
if
( (i
=
askForSave())
==
3
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
return
;
}
System.exit(
0
);
}
}
//////////////////////////////
/内部监听类
////////////////////////////
//
监听文本区变动
class
MyFocusAdapter
extends
FocusAdapter
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
//
如果文本区没有选中的内容,则相应菜单项不可用
public
void
focusLost(FocusEvent e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
String str
=
text.getSelectedText();
if
(str
!=
""
&&
str
!=
null
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
//
菜单项
miCut.setEnabled(
true
);
miCopy.setEnabled(
true
);
miDelete.setEnabled(
true
);
//
右键菜单项
pmCut.setEnabled(
true
);
pmCopy.setEnabled(
true
);
pmDelete.setEnabled(
true
);
}
else
{
miCut.setEnabled(
false
);
miCopy.setEnabled(
false
);
miDelete.setEnabled(
false
);
pmCut.setEnabled(
false
);
pmCopy.setEnabled(
false
);
pmDelete.setEnabled(
false
);
}
}
}
public
static
void
main(String[] args)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
NotePad nt
=
new
NotePad();
}
}
//
End of main class
//////////////////////////
外部类
////////////////////////////////
////////////////////
/查找对对话框类
////////////////////////////
class
FindDialog
extends
JDialog
implements
ActionListener
![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
//
引入np属性是为了通过构造器的参数传入NotePad的对象,
//
从而方便访问其内部属性与方法
NotePad np;
JTextField tex;
JLabel label;
JButton find;
JButton exit;
public
FindDialog(NotePad owener)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
super
(owener,
"
查找
"
,
false
);
this
.np
=
owener;
label
=
new
JLabel(
"
查找内容
"
);
tex
=
new
JTextField(
5
);
find
=
new
JButton(
"
查找下一个
"
);
exit
=
new
JButton(
"
取消
"
);
Container contentPane
=
getContentPane();
contentPane.setLayout(
new
GridLayout(
2
,
2
));
contentPane.add(label);
contentPane.add(tex);
contentPane.add(find);
contentPane.add(exit);
this
.setSize(
210
,
80
);
this
.setLocation(
450
,
350
);
this
.setResizable(
false
);
find.addActionListener(
this
);
exit.addActionListener(
this
);
tex.addKeyListener(
new
MyKeyAdapter());
find.setEnabled(
false
);
this
.setVisible(
true
);
}
public
void
actionPerformed(ActionEvent e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
String str
=
np.text.getSelectedText();
if
(str
==
""
||
str
==
null
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
np.findIndex
=
0
;
}
if
(e.getSource()
==
find)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
np.find(tex.getText(),np.findIndex);
}
else
if
(e.getSource()
==
exit)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
this
.dispose();
}
}
class
MyKeyAdapter
extends
KeyAdapter
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
public
void
keyReleased(KeyEvent e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
if
(np.text.getSelectedText()
!=
""
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
find.setEnabled(
true
);
}
}
}
}
//////////////////////
查找替换对话框
////////////////////////
/
class
ReplaceDialog
extends
JDialog
implements
ActionListener
![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
NotePad np;
JTextField ft;
JTextField rt;
JLabel b1;
JLabel b2;
JButton find;
JButton rp;
JButton rpa;
JButton exit;
public
ReplaceDialog(NotePad owener)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
super
(owener,
"
替换
"
,
false
);
this
.np
=
owener;
b1
=
new
JLabel(
"
查找内容
"
);
b2
=
new
JLabel(
"
替 换 为
"
);
ft
=
new
JTextField(
8
);
//
初始状态将已查找到的字符串放在此文本框中
ft.setText(owener.text.getSelectedText());
rt
=
new
JTextField(
8
);
find
=
new
JButton(
"
查找下一个
"
);
rp
=
new
JButton(
"
替 换
"
);
rpa
=
new
JButton(
"
全部替换
"
);
exit
=
new
JButton(
"
取 消
"
);
Container cp
=
getContentPane();
JPanel p1
=
new
JPanel();
JPanel p2
=
new
JPanel();
JPanel p3
=
new
JPanel();
p1.setLayout(
new
GridLayout(
2
,
3
,
5
,
2
));
p1.add(b1);
p1.add(ft);
p1.add(find);
p1.add(b2);
p1.add(rt);
p1.add(rp);
cp.add(p1,BorderLayout.NORTH);
p2.setLayout(
new
FlowLayout(FlowLayout.RIGHT));
p2.add(rpa);
p2.add(exit);
cp.add(p2,BorderLayout.SOUTH);
this
.setSize(
350
,
120
);
this
.setLocation(
400
,
350
);
this
.setResizable(
false
);
find.addActionListener(
this
);
rp.addActionListener(
this
);
rpa.addActionListener(
this
);
exit.addActionListener(
this
);
ft.addKeyListener(
new
MyKeyAdapter());
rt.addKeyListener(
new
MyKeyAdapter());
find.setEnabled(
false
);
rp.setEnabled(
false
);
rpa.setEnabled(
false
);
this
.setVisible(
true
);
}
public
void
actionPerformed(ActionEvent e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
if
(e.getSource()
==
find)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**/
/*
String str=np.text.getSelectedText();
if(str==""||str==null)
{
np.findIndex=0;
}
*/
if
(ft.getText().equals(np.findStr)
==
false
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
np.findIndex
=
0
;
}
np.findStr
=
ft.getText();
np.find(np.findStr,np.findIndex);
}
if
(e.getSource()
==
rp)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
String str
=
np.text.getSelectedText();
if
(str
!=
""
&&
str
!=
null
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
np.text.replaceSelection(rt.getText());
}
}
if
(e.getSource()
==
rpa)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
int
n
=
np.text.getText().length();
np.replaceAll(ft.getText(),rt.getText(),
0
,n);
}
else
if
(e.getSource()
==
exit)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
this
.dispose();
}
}
class
MyKeyAdapter
extends
KeyAdapter
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
//
如果查找或替换框内没有内容则相应按钮不可用
public
void
keyReleased(KeyEvent e)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
if
(ft.getText()
!=
""
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
find.setEnabled(
true
);
}
if
(rt.getText()
!=
""
)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
rp.setEnabled(
true
);
rpa.setEnabled(
true
);
}
}
}
}
我将上面源代码编译后,打成可执行的Jar包,运行效果如下:
![](/images/blogjava_net/qnjian/10057/o_np.JPG)
posted on 2006-04-15 01:06
南一郎 阅读(3178)
评论(14) 编辑 收藏